I read this article called The Physics of Santa Claus. It was about how Santa couldn't be real and all the evidence that he couldn't be real. It said how Santa's sleigh had to be really fast to give presents to all the good boys and girls. He would also gain a lot of weight because he would have to eat a lot of cookies and milk. It also said how fast his sleigh would go and that his reindeer would burn and that he would also die because he would burn too. I also checked the rebuttals to see how people would respond. Some people said that the calculations were wrong, but they still agreed. I would say that Santa couldn't be real because he would die on the trip. He would also have to have a lot of presents on his sleigh and have to carry a lot of weight. Also, he would gain a lot of weight by eating so many cookies and drinking a lot of milk. Still this article was really funny. If he were real, then it would be pretty impressive for him to still be alive after Christmas. I wish Santa was real because he would give presents to the good people. My family already knows that Santa Claus isn't real. I'm pretty sure that everyone in the world knows that Santa Claus isn't real. It's just my opinion.

You gave two good reasons about why santa can't be real. I thought you could have given a little more evidence. And also not every one in the world "knows" that santa is not real because there are many children that believe in him and I am sure there are a few adults that believe also.